Can you please provide step by step explanations?

Consider a project with free cash flows in one year of $90,000 in a weak economy or $117,000 in a strong economy, with each outcome being equally likely. The initial investment required for the project is $80,000, and the project's cost of capital is 15%. The risk-free interest rate is 5%. 34) Suppose that you borrow $30,000 in financing the project. According to MM proposition II, the firm's equity cost of capital will be closest to: A) 25% B) 20% C) 21% D) 15%